Note 5 - Debt Securities (Details Textual)	6 Months Ended
Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Debt Securities, Available-for-Sale, Realized Gain (Loss)	$ 0	$ 0
Debt Securities, Available-for-Sale, Excluding Accrued Interest	24,534,000		$ 25,693,000
Debt Securities Available For Sale Nonaccrual	0	0
Debt Securities Available For Sale Nonaccrual Interest Income	0	$ 0
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss	177,000		182,000
US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Available-for-Sale, Excluding Accrued Interest	$ 10,170,000		10,551,000
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	16
Debt Securities, Available for Sale, Total Number of Positions	18
Debt Securities, Available-for-Sale, Unrealized Loss Position, Percent of Amortized Cost	8.70%
Asset-Backed Securities [Member]
Debt Securities, Available-for-Sale, Excluding Accrued Interest	$ 7,013,000		7,216,000
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	4
Debt Securities, Available for Sale, Total Number of Positions	5
Debt Securities, Available-for-Sale, Unrealized Loss Position, Percent of Amortized Cost	9.40%
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Debt Securities, Available-for-Sale, Excluding Accrued Interest	$ 7,351,000		7,926,000
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	29
Debt Securities, Available-for-Sale, Unrealized Loss Position, Percent of Amortized Cost	7.30%
Asset Pledged as Collateral [Member] \| Federal Home Loan Bank Advances [Member]
Debt Securities, Available-for-Sale, Excluding Accrued Interest	$ 6,000,000		$ 6,600,000

The debt securities available for sale, nonaccrual.

No definition available.

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- Definition

The interest income on debt securities available for sale.

+ References

No definition available.

+ Details

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- Definition

The total number of positions for available for sale debt securities.

+ References

No definition available.

+ Details

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- Definition

Represents the percentage of available for sale debt securities in an unrealized loss position from amortized cost.

+ References

No definition available.

+ Details

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- Definition

Amount, after allowance for credit loss, of accrued interest on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 3A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-3A

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-3B

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- Definition

Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

+ Details

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- Definition

Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-9

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- Definition

Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-4

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